Cabinet knob



FIG. 1 is a perspective view of the cabinet knob showing my new design, the depth of the area surrounding the central button of the knob is conventional;

FIG. 2 is a perspective view of the cabinet knob showing my new design;

FIG. 3 is a front and back elevational view thereof;

FIG. 4 is a right and left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines form no part of the claimed design. 

The ornamental design for a cabinet knob, as shown and described. 